Pumping jack



C. M. RATLEY Oct. 9, 1934.

PUMPING JACK Filed July 17,` 1953 2 sheets-Sheet l Cla/'enceMRalleygmmr c. M. RATLEY Oct. 9, 1934.

PUMPlNG JACK Fil-.ed July 17, 1933 2 Sheets-Sheet 2 Clw-LC Snventot F l c (Ittomegs Patented Oct. 9, 1934 UNITED STATES YPATENT CFFICE PUMPING JACK Application July 17, 1933, Serial No. 680,872

1 Claim.

This invention relates to a pumping jack and an object is to provide simple and efficient means whereby its stroke can be varied at will without interfering with the operation of the apparatus,

said means being readily accessible and allowing the adjustment to be effected quickly.

With the foregoing and other objects in view which will appear as the description proceeds the invention resides in the combination and arrangement of parts and in the details of construction hereinafter described and claimed it being understood that changes in the precise embodiment of the invention herein disclosed may be made within the scope of what is claimed without departing from the spirit of the invention.

In the accompanying drawings the preferred form of the invention has been shown.

In said drawings Figure 1 is a side elevation of the jack.

Figure 2 is a plan view.

Figure 3 is a section on line 3 3, Figure l through a portion of the device.

Figure 4 is a section on line 4 4, Figure 1.

Figure 5 is a section on line 5 5, Figure 1.

Figure 6 is a iront elevation of the pump-rod connection.

Referring to the figures by characters of reference, 1 designates standards mounted on base beams or sills 2 and converging upwardly to a cap plate 3, thereby forming a pedestal which can be reinforced by brace or guy rods 4 connecting the cap to the ends of the sills.

A bearing block 5 is secured on the cap plate 3 and is pivotally connected at 6 to a plate 7 depending from a walking beam 8. This beam is formed of parallel members 9 connected by spacing blocks l0 and a substantially elliptical head 11. The head has rolling contact with a pump rod 13, and a cross head 14 which is attached to the rod is connected to the beam by links 15 and a transverse bolt 16.

A hanger consisting of spaced members 17, is fixedly connected to the Walking beam near its fulcrum and secured within the beam and the upper portion of the hanger is a coupling block 18. A bore 19 extends through the block and provides a bearing for the swiveled end 20 of an adjusting screw 21.

The lower end of the screw bears Within a spacing block 22 connecting the lower ends of the members 17 and braces 23 connect this block 22 to blocks near the respective ends of beam 8.

A slide 24 is mounted in hanger 17 and is engaged by screw 2l. One end of the block projects from the hanger and has a bolt 25 extended therethrough for engagement with pull rods 26. These rods extend across opposite sides of the hanger and one of the braces 23 and are adapted to be actuated by power means not shown.

A hand wheel 27 is secured to the upper end @o of the screw close to and above the walking beam.

In practice the walking beam is operated by rods 26 and hanger 17. Should it be desired to vary the stroke or" the beam the operator rotates wheel 27. This will turn the screw 21 in the de- 55 sired direction to raise or to lower the slide 24. By raising theV slide the distance to ulcrum 6 is reduced and the stroke proportionately increased. By lowering the slide the stroke is reduced.

VAs thehand wheel is located near the fulcrum Jo of the beam it will not have excessive up and down movement therewith. Therefore it can be operated easily while the beam is in motion.

What is claimed is:

A pumping jack including a pedestal, a walking 75 beam supported thereby and comprising spaced parallel members, spaced members depending from the walking beam adjacent to but out of alinement with the fulcrum thereof and constituting a hanger, a coupling block secured between so the members of the walking beam and extending between and secured to the members of the hanger thereby connecting said members rigidly to the beam, a screw journaled in the block and extending within and longitudinally of the hanger, a slide in the hanger engaging the screw, a pull rod embracing the hanger to exert a pull thereon, said rod being connected to the slide, a hand wheel on the screw and above the beam adjacent to the beam fulcrum, and braces connecting the hanger 9o and beam, said pull rod, hanger and braces working within the pedestal.

CLARENCE M. RATLEY. 

